Expanded on user domain model

dotnet/AipsCore/Domain/Models/User/ValueObjects/UserCreatedAt.cs

@@ -0,0 +1,23 @@
+using AipsCore.Domain.Abstract.Rule;
+using AipsCore.Domain.Abstract.ValueObject;
+using AipsCore.Domain.Common.Validation.Rules;
+
+namespace AipsCore.Domain.Models.User.ValueObjects;
+
+public record UserCreatedAt : AbstractValueObject
+{
+    public DateTime CreatedAtValue { get; private set; }
+
+    public UserCreatedAt(DateTime CreatedAtValue)
+    {
+        this.CreatedAtValue = CreatedAtValue;
+            Validate();
+    }
+    
+    protected override ICollection<IRule> GetValidationRules()
+    {
+        return [
+            new DateInPastRule(CreatedAtValue)
+        ];
+    }
+}

dotnet/AipsCore/Domain/Models/User/ValueObjects/UserDeletedAt.cs

@@ -0,0 +1,23 @@
+using AipsCore.Domain.Abstract.Rule;
+using AipsCore.Domain.Abstract.ValueObject;
+using AipsCore.Domain.Common.Validation.Rules;
+
+namespace AipsCore.Domain.Models.User.ValueObjects;
+
+public record UserDeletedAt : AbstractValueObject
+{
+    public DateTime? DeletedAtValue { get; private set; }
+    
+    public UserDeletedAt(DateTime? DeletedAtValue)
+    {
+        this.DeletedAtValue = DeletedAtValue;
+        Validate();
+    }
+    
+    protected override ICollection<IRule> GetValidationRules()
+    {
+        return [
+            new DateInPastRule(DeletedAtValue)
+        ];
+    }
+}